Knitting-machine.



@Unie STATES PATENT OFFICE.

HARRY SWINGLEHURST, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR, BY MESNE ASSIGNMENTS, TO SCOTT & WILLIAMS, INCORPORATED, OF CAMDIEIN, NEW JERSEY,

A CORPORATION OF NEW JERSEY.

KNITTING-MACHINE.

Specification of Letters Patent.

Patented Aug. 13, 1912.

To all whom t may concern.' Be it known that l", HARRY SwiNoLniiUnS'r, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Knitting- Machines, of which the following is a specification.

My invention relates to knitting machines in which a set of latch needles is mounted at anangle to another set of co-acting devices, such for instance, as the other needles in an ordinary rib knitting machine; transfer points, in a machine for knitting open work fabrics; web holders, in a plain web machine; or loopers in ay machine for knitting fabric with tleecing yarn combined therewith, the object of my invention being to so construct such a machine as to prevent the latches of the needles from coming into contact with the devices with which said needles co-act in the operation of the machine, and thereby producing defective work or causing injury to the latches or other parte of the machine. This object I attain in the manner hereinafter set forth, reference bein had to the accompanying drawing, in W ich Figure l is an exaggerated plan view of part of the needle cylinder, needle dial, Cyl-` inder cam ring, and dial c am cap of an ordinary circular rib yknitting machine, illustrating the defect in the latter which my invention has been designed to overcome, and Figs, 2, 3 and 4 are views illustrating means in accordance with my invention for remedying this defect.

In rib knitting machines of fine gage in which the cylinder and dial needles o erate './in close proximity to one another di culty 40 has been experienced because of contact of the latches of the cylinder needles with adjoining dial needlesin the opening or closing movement of said latches, this defect beling due partl to the twisting of the needle in the needle/ygroove of the cylinder under ythe thrust` 'offethe cams upon its' rejecting Abutt, and partly to looseness of t between the latch and the needle shank, the defect being exaggerated as the parts wear and y consequently are susceptible of more and 4 gioie motion. *The nature Vof the defect will e` understoodaon 'reference to Fig. lof the drawing, in which 1 represents the needle cylinder of the machine, 2 the cylinder cani ring which has movement in respect to the needle cylinder, as indicated by the arrow, 3 the cylinder needles, 4 their latches, 5 the dial needles, 6 the needle dial, and 7 the dial cam cap.

The normal plane of movement of the' 60 cylinder needle latch 4 would be that of the radial line ai, but owing to the causes before mentioned, the actual plane of movement ofsaid latch is so distorted that in machines of tine gage, itv has a tendency to come into e5 cont-act with the adjoining dial needle 5, as shown.

One means which I have devised to overcome the defect is to slightly incline the needle-guiding grooves of the cylinder in re-N spect to a. radial line drawn from the axis' of the cylinder, or so that they will not be perpendicular to the face of the cylinder, as

shown in Fig. 2, the inclination of the grooves being forwardly or in a direction the reverse of the direction of movement of the cylinder cam ring in respect to the cylinder, or, in case the cylinder is the moving member, in the direction' of such movement.l In the claims I have used theterin acute 80 angle in order to indicate this dispositionl of the grooves. By this means those factorslwhich before operated to detlect. thel latch from its normal working plane, now-operate' to cause it to assume that plane, as shown 1n 85- Fig. 2, consequently thelatch moves i'n its -intended relation to the following dialnee-` dle, and interference of onewith the other is prevented. The same result may be attained by so disposing the grooves which re- 9o ceive the dial needles that said grooves are 'not perpendicular to the edge of the dial,

but are so inclined as to be parallel with the abnormal planes of movement of the cylinder needle latches, as shown in Fi r. 3. In ,95'- soine cases, it may be advisableto ado t this construction in theV dial as well as in the cyll inder, that is to say, the dial needle grooves lwill not be perpendicular to the face of the dial. Such construction is shown in Fig.. 4, and the` dial may'have the ooves thus 1inclined,r' and also inclined 1n the manner I 'make no' claim herein to the 'dial having its guide grooves so disposed as to bisect radial lines drawnlfrom the center to thepe; riphery of the dial or to a knitting machineV containing such a dial as that invention iojov ures which I have devised.

therein grooves which guide forms the subject of a divisional application tiled by me'on the 11th day of April, 1912, Serial No. 690,146.

Although I have shown my invention as applied` to a circular machine, it is equally applicable to straight bar machines, and the terms cylinder and dia-l as used in the claims are intended to cover segments of such members, as well.

As before indicated, my invention is not' limited to machines in which both members carry latch needles, as but one of said members may be thus equipped, the other member carrying transfer points, web holders, fleeoing yarn loopers, or the like, whose planes of operation are such as would cause them to be fouled by the latches of the needles in the absence of the preventive meas- I claim l. A knitting machine member ,having in their recip. rocating movements knitting instrumentalities placed therein but which are disposed at an acute angle to the face of said member, as and for the purpose set forth.

2. A knitting machine needle carrier having therein grooves which guide the needles in their reciprocating.movement, but which are disposed at an acute angle to the face of the needle carrier, as and for the purpose set forth. v l

3. A knitting machine cylinder having therein needle-guiding grooves which are at an acute angle to the face of the cylinder, as and for the purpose set forth.

4. A knitting machine having two members disposed at an angle to each other, and cooperating knitting instrumentalities guided in grooves in said members, those of Washington,

' member having nLosaese one member working in the spaces between those of the other member, and one member having grooves which are at an acute angle to the face of the said member whereby to 'prevent the implements guided by said grooves from crossing the planes of movement of the implements' guided in the grooves of the other member.

5. A knitting machine needle carrier having needle-guiding grooves inclined in respect to the normal plane of movement of the needle latch, as and for the purpose set forth..

6. A knitting machine having two members disposed at an angle to each other,

and cooperating knitting instrmnentalities guided 1n grooves in. said members, one member having grooves which are disposed at an acute angle in respect to the face of the same, whereby parallelism is established between the instrumentalities mounted in said grooves and those mounted in the grooves of the other member.

7. A knitting machine having two members disposed at an-` angle to each other, and cooperating knitting instrumentalities guided in grooves insaid members, one grooves which are disposed at an acute angle to the face whereby parallelism is established between the implements guided in said grooves and those guided in the grooves of the other member.

In testimony whereof, name to this'specification, two subscribing witnesses.

HARRY SWINGLEHURST.

YVitnesses:

' HAMILTON D. TURNER,

IQTE A. BEAD I have signed my in the presence of of the same, 

